From: Kent Overstreet <kmo@daterainc.com>
Date: Wed, 30 Oct 2013 00:17:49 +0000 (-0700)
Subject: dm: Refactor for new bio cloning/splitting
X-Git-Tag: v3.14-rc1~43^2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1c3b13e64cf70d652fb04e32d13ae3e36810c2e4;p=pandora-kernel.git

dm: Refactor for new bio cloning/splitting

We need to convert the dm code to the new bvec_iter primitives which
respect bi_bvec_done; they also allow us to drastically simplify dm's
bio splitting code.

Also, it's no longer necessary to save/restore the bvec array anymore -
driver conversions for immutable bvecs are done, so drivers should never
be modifying it.

Also kill bio_sector_offset(), dm was the only user and it doesn't make
much sense anymore.

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: dm-devel@redhat.com
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
---

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